package com.designPattern.singleton;

/**
 * @Auther: zwg
 * @Date: 2019/2/26 11:12
 * @Description:
 */
public class Singleton {
    private volatile static Singleton instance = null;

    private Singleton() {

    }

    public static Singleton getInstance() {
        if(instance==null) {
            synchronized (Singleton.class) {
                if(instance==null)
                    instance = new Singleton();
            }
        }
        return instance;
    }

    public static void main(String[] args) {

    }
}
